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Questions tagged [everyday-chemistry]

Applications of chemistry to reagents, reactions and processes of everyday life. Use this tag for question on chemistry in an out-of-laboratory/class context. DO NOT use this tag merely because the question is about simple chemistry.

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Removing fluorine from water

The "Boy Scout" water purification kit now contains iodine and ascorbic acid. The iodine kills microorganisms present. The ascorbic acid (a chelating agent) has been added to this new "Boy Scout" ...
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0answers
8 views

Titration Problem [on hold]

If 22.90 mL of 0.115 M barium hydroxide is required to neutralize 28.3 mL of nitric acid, what is the molarity of the acid? 2HNO3(aq)+Ba(OH)2(aq)→Ba(NO3)2(aq)+2H2O(l) Express your answer with the ...
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0answers
10 views

Deodorants: are drying agents used, to help evaporation? [on hold]

I'm investigating types of ingredients used in deodorants. I'm sure one important action is increasing rate of evaporation of sweat. I'd like to know what some of these more commonly used chemicals ...
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1answer
59 views

Applications of magnesium sulfate monohydrate MgSO4 · H2O

How is magnesium sulfate monohydrate $\ce{MgSO4 * H2O}$ used for in chemistry and how does it work as a valuable laboratory drying agent? I could not find too much information in my book or the ...
32
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1answer
17k views

Why super glue does not stick inside their own bottle?

We usually use super glue to stick any two objects but I was wondering like why don't they stick inside their own bottle ?
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25 views

I'd like to ask, how to make permanent ink, that will be invisible when used, but after like 1hr - 3days it will appear (preferably dark color)? [closed]

URGENT.Can someone help me on how to make permanent ink, that will be invisible when used, but after like 2 or 3 days, it will appear (preferably dark colors)? Thank you.
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0answers
18 views

Why does coconut oil spoil much faster than groundnut oil?

I have observed that various foods cooked using coconut oil spoil much faster than foods cooked using groundnut oil. One good example is Asian coconut milk curry. Even with proper refrigeration, this ...
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0answers
19 views

How many Oxygen atoms are present in 1.0 x 10^9molecules of Aspartame, C14H18N2O5? [closed]

How many Oxygen atoms are present in 1.0 x 10^9molecules of Aspartame, C14H18N2O5?
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2answers
2k views

Does ice melt faster when submerged in water?

Suppose you have a container with a drain at the bottom full of frozen H2O which you leave a room temperature to melt. Will the ice melt faster if you drain the water as it melts? I would expect that ...
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2answers
4k views

Why does ice crack when a drink is poured on it?

I think most people have experienced this, but while pouring a beverage over ice I noticed the ice cracked. Before After My initial thought was that because the beverage has an antifreeze property ...
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0answers
24 views

Hot Water Tanks [closed]

I have a room $\pu{810m3}$ and I add a 20,000 litre insulated hot water tank ($\pu{3.7m}$ diameter x $\pu{2.8m}$ high) containing water at $\pu{65 ^\circ C}$. How much will the temperature and ...
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0answers
29 views

What is the formula for an element under normal conditions? [closed]

Selenium, oxygen, bromine and vanadium, I tried entering what I though was the diatomic number for these, like $\ce{O2}$, $\ce{V2}$, $\ce{Br2}$, $\ce{Se2}$, but it doesn't work. Any feedback on this?
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22 views

Why cant nail polish be used as an acid mask for making a PCB?

In the question: PCB etching with sodium persulfate, permanent markers seem the most used and experimented with. The thickness of nail polish would give more solid planes and traces. Might nail ...
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0answers
24 views

What neutralizes the active ingredients (napthalene and/or paradichlorobenzene) in moth balls? [closed]

Question: What is effective in removing residual moth ball smell from inside a car? Issue: We used moth balls in our car to rid it of mice. (Never do this; it does not work.) We removed the moth ...
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0answers
36 views

Mixing dilute hydrochloric acid and battery acid

I was doing an experiment on gold recovery. When I added some gold platted pins to battery acid nothing seemed to happen.I impatiently added some duluted hydrochloric acid labeled 20%, immediately ...
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0answers
38 views

What really happens when wax 'dries out'? [closed]

I know that there's a lot of different types of things that fall under the 'wax' umbrella, but they all seem, eventually, to various degrees, to 'dry out'. For example, this other SE question (and ...
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1answer
193 views

Disrupting the chemistry of oobleck so that it behaves like a newtonian fluid

Oobleck (a mixture of cornstarch and water) is a non-newtonian fluid, so it acts like a solid when under pressure, and like a liquid otherwise. My question is this, is there anything you could mix in ...
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2answers
45 views

Why does MgCl2 become Mg^2+ and Cl^-? [closed]

I'm taking a biology class, and it's one-chapter intro to chemistry chapter had been driving my study group nuts. On a recent quiz, it asked the question: In water, $\ce{MgCl2}$ dissociates into $\...
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0answers
22 views

How to align povidone-iodine molecules in order to look for optical polarization?

In this answer I mention how early polarizing filters (e.g. sunglasses) were made by doping a polymer with iodine atoms and then stretching the film to orient the polymer molecules. Electrons donated ...
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4answers
53k views

Why is salt needed when using vinegar to clean pennies?

Let's say you have a solution that is vinegar and it has salt ($\ce{NaCl}$) dissolved in it. Then you place old dull pennies in it. Then you look at it 5 minutes later and the pennies are clean and ...
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0answers
24 views

Is borax redundant to trisodium phosphate as a cleaner?

I know that trisodium phosphate (TSP) is used as a rinse aid in cleaning solutions, but I have also seen borax as an (alternative?) ingredient as well. Is borax redundant to TSP, in other words, is ...
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0answers
20 views

Should I blend at high or low speeds to minimize oxidation of fruits and veggies in juice? [duplicate]

How are antioxidants in fruit and vegetable juice preserved by blending at high speeds for shorts periods of time, or blending at lower speeds for longer periods of time?
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1answer
21 views

Transferring suspended substance from isopropyl alcohol to water?

I have this UV-reactive invisible ink (a clear liquid.) According to the data sheet, it is suspended in an isopropyl alcohol base. Unfortunately, this is terrible for my particular application for two ...
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3answers
9k views

What is the freezing point of sulfuric battery acid?

As we all know, the freezing point of absolute sulfuric acid is 10 °C. The average lead-acid battery (sulfuric) uses ~30% sulfuric acid, and has a freezing point much lower than 10 °C. What ...
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5answers
3k views

How 'heavy' should an element be, to be a “Heavy Metal”?

I've come across the term "Heavy metals" innumerable times in articles, mostly pertaining to environmental issues. Is there a weight range (of sorts) against which an element (metal) is classified as ...
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1answer
31 views

Will fruits and vegetables be more oxidized if blended at high speed for a long time or at less rpm for a short period of time? [closed]

Will fruits and vegetables be less oxidized if blended at higher speeds for shorter periods of time, or at lower speeds for longer periods of time? Do the oxidized molecules in vegetable juice ...
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1answer
89 views

How much yeast is necessary to produce the same amount of carbon dioxide that I exhale?

I think I might have bed bugs. I read that bed bugs are attracted to $\ce{CO2}$ and heat, I also know that yeast produces $\ce{CO2}$ as a waste product. Knowing that, I did some research and found ...
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0answers
30 views

Can a substance be extracted from solution by adding another substance with a higher solubility?

Suppose that I have a substance X dissolved in water. I then add a substance Y to the solution. Substance Y has a higher solubility in water than substance X, and more than enough of substance Y is ...
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3answers
3k views

How is seawater alkaline?

If when water and carbon dioxide react they form carbonic acid, carbonate, and bicarbonate, how does seawater still have a pH of around 8? Doesn't a compound need an hydroxide ion to be a base?
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0answers
2k views

Isolation of codeine phosphate from Tylenol 2

So here is my question. This may be controversial for some, but I would like to tell you it is purely speculative and has no bearing on anything I would actually do. If one has in their hands a ...
5
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1answer
5k views

I have 1 litre of water at 45 °C. How long would it take to evaporate when ambient temperature is 25 °C?

Assume that the water is 2 cm deep in a flat pan (if that is relevant). EDIT: As a fun experiment, I'm trying to evaporate a mixture of powdered root and water in my kitchen. I've heated the mixture ...
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2answers
194 views

Do all decomposition reactions involve heat? [closed]

When water decomposes into Hydrogen and Oxygen as in 2H2O—-> 2H2+O2 does this involve heat? Is it always implied that heat is involved in a decomposition reaction or does this just spontaneously occur?...
3
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1answer
1k views

Decomposition of iron(III) acetate?

I recently asked about the synthesis of iron (III) acetate. I want a rather concentrated solution to use as a calligraphy ink (which will be dissolved in alcohol/water). Will it be okay to heat the ...
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2answers
470 views

What causes the “white water” smell?

I can detect a distinct smell when I am near water going over a weir. I could tell that I was near "white water" if I was blindfold. Can anyone tell me what causes this odour?
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2answers
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what is the exact meaning of oxidation state? [duplicate]

can you mention the concept of oxidation state without its simple definition i-e it is the apparent charge +ve or -ve.....😪 I found these in wikipedia but didn't understand."Conceptually, the ...
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2answers
1k views

Why oxygen leaks from tires faster than nitrogen?

In critical applications tires are inflated using pure nitrogen (link). Nitrogen molecules have a more difficult time escaping through the microscopic spaces that exist between a tire's rubber ...
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1answer
3k views

Does a gold detector exist?

I see many sites that claim to sell working gold detectors but I am not convinced that they work. Also, does a metal detector detect gold?
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2answers
3k views

How to Prepare a Buffer Solution?

Problem I am given the task of preparing three buffer solutions at pH 10, 9.5, and 9.0. I have available concentrated ammonia and 3M hydrochloric acid. Attempt at Solving By adding HCl to a ...
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1answer
59 views

Pesticide Edolan U

I have recently become aware that old woolen blankets from the 1940:s to the 1970:s often contain the pesticide "eulan U 33" or "Edolan U" and wonder what is the best way to dispose of these. Ordinary ...
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0answers
58 views

Detecting alkaloids - Dragendorff's reagent

I am writing a book and as part of the plot one of the characters has a plant that contains alkaloids in tincture form. They want to do a test to detect for the alkaloids so they use the Dragendorff's ...
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2answers
903 views

Do polymerized cooking oils release free radicals

I am seasoning a carbon steel wok and from what I understand it basically involves heating cooking oil on it until it gets to the smoke point and then forms a polymerized layer that makes it like a ...
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3answers
956 views

What are physical properties and chemical properties?

As the question title says, I would like to know what the physical and chemical properties are. If possible, please include examples. Since it seems to be related, I would also like to know what ...
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2answers
715 views

How is Persian blue rock salt made?

How is Persian blue rock salt made and what does it contain that makes it look blue?
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1answer
135 views

Powdering aluminum chemically?

I need a fine aluminum powder for many reactions/experiments. Could I dissolve the metal in an acid and then drop it out of solution using a base, or vice versa? What would be the best chemicals/...
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2answers
541 views

Le Chatelier's principle: Are there any exceptions?

The way Le Chatelier's principle is presented in most introductory chemistry books (high-school) is as though it's an indisputable law of the physical world (in the sense that we're never shown an ...
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3answers
21k views

Why do other sugars melt whereas sucrose decomposes?

Sucrose decomposes at 186 °C. It doesn’t melt but when it reaches decomposition temperature, sucrose decomposes into fructose and glucose. After cooling and hardening it is no longer sucrose. Am I ...
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1answer
33 views

Is the flint used in disposable lighters toxic?

Especially the sparks that result when using them. I heard this from a friend and can't seem to find an answer on Google.
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0answers
25 views

How to make rheoscopic fluid using glycol stearate flakes

Rheoscopic fluid can be made by adding mica powder to water. I read that mica powder can settle and condense after sitting around for a long time. So I want to use glycol stearate flakes instead. ...
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1answer
54 views

Aluminum and aluminum oxide

I have a new grain mill that I am hesitant to use because the rollers are anodized aluminum. As I understand it the anodized aluminum is actually aluminum oxide and supposedly non-toxic. I realize ...
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1answer
643 views

Solvents adequate for dissolving overheated polyethylene terephthalate glycol-modified (PETG) residue?

I work in 3D printing. One of the materials we use is polyethylene terephthalate glycol-modified, or PETG. It is a pretty good material, both in strength and appearance. It is melted and pushed ...